Other language bugs from Challenge games description. I'll write them down as they sould be:
1. Angel of Berserk:
* "You don't have a gun at the start" (I'm not entirely sure about this one, can a native speaker among you please confirm?)
That is more correct. You could also say, "You don't start with a gun." Either would be fine.
* "...large medkit and Large Healing Globe work on you..." (instead of 'works') - I'd suggest putting this sentence into plural altogether: "large medkits and LHGlobes work on you"
That is a good suggestion to pluralize the whole thing.
2. Angel of Marksmanship:
* USE anything else than a pistol
"Than" is correct, but perhaps the whole sentence should be rewritten as:
This challenge doesn't allow you to use any weapon other than a pistol (or two if you know how)!
3. Angel of Haste:
* Sentence "Each down stairs takes you..." doesn't look good. Would "Each stairs down take you" be better?
Good suggestion, "stairs down" reads better than "down stairs". I don't know about the pluralizing of "take" vs "takes", though. "Takes" you is probably the common use even though "take" may be proper English. Either would probably be fine.
Maybe you could just say "Each time you go down stairs you descend 2 levels instead of 1." Or something like that.